Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

The Arabidopsis HYL1 gene encodes a nuclear double-stranded RNA-binding protein. A knockout mutation of the hyl1 gene is recessive and pleiotropic, causing developmental abnormalities, increasing sensitivity to abscisic acid, and reducing sensitivity to auxin and cytokinin. We report that levels of several microRNAs (miRNAs; miR159, -167, and -171) are reduced in homozygous mutant plants, and levels of two of three tested target mRNAs are elevated. Conversely, the miRNA levels are elevated in plants expressing a HYL1 cDNA from a strong promoter, and the corresponding target RNAs are reduced. These changes result from alterations in the stability of the target RNAs. However, double-stranded RNA-induced posttranscriptional gene silencing is unaffected by the hyl1 mutation. One-third to one-half of the cellular HYL1 protein is in a macromolecular complex, and a GFP-HYL1 fusion protein is found predominantly in the nucleus, although it is observed in both nucleus and cytoplasm in some cells. Within nuclei, HYL1 is associated with subnuclear bodies and ring-like structures. These observations provide evidence that the HYL1 protein is part of a nuclear macromolecular complex that is involved in miRNA-mediated gene regulation. Because hyl1 mutants show marked abnormalities in hormone responses, these results further suggest that miRNA-mediated changes in mRNA stability play a vital role in plant hormone signaling.

Bibliography

Han, M.-H., Goud, S., Song, L., & Fedoroff, N. (2004). The Arabidopsis double-stranded RNA-binding protein HYL1 plays a role in microRNA-mediated gene regulation. Proceedings of the National Academy of Sciences, 101(4), 1093–1098.

Authors 4
  1. Meng-Hsuan Han (first)
  2. Saiprasad Goud (additional)
  3. Liang Song (additional)
  4. Nina Fedoroff (additional)
References 52 Referenced 427
  1. 10.1016/S1097-2765(03)00352-6
  2. 10.1016/S0074-7696(02)19011-5
  3. Bernstein, E., Denli, A. M. & Hannon, G. J. (2001) RNA 7, 1509–1521.11720281 / RNA (2001)
  4. 10.1101/gad.1127103
  5. 10.1073/pnas.1630797100
  6. 10.1126/science.1064921
  7. 10.1038/nature01958
  8. 10.1105/tpc.016238
  9. 10.1016/S0960-9822(02)00809-6
  10. 10.1126/science.1065062
  11. 10.1126/science.1065329
  12. 10.1105/tpc.003210
  13. 10.1101/gad.974702
  14. 10.1016/S0960-9822(02)01017-5
  15. 10.1101/gad.1004402
  16. Jacobsen, S. E., Running, M. P. & Meyerowitz, E. M. (1999) Development (Cambridge, U.K.) 126, 5231–5243. / Development (Cambridge, U.K.) (1999)
  17. 10.1016/S0092-8674(01)00431-7
  18. 10.1126/science.1073827
  19. 10.1016/S1360-1385(02)02355-5
  20. 10.1038/nature01957
  21. 10.1016/S0960-9822(03)00293-8
  22. 10.1126/science.1076311
  23. Chen X. (September 11 2003) Science 10.1126/ science.1088060 .
  24. 10.1101/gad.1064703
  25. 10.1016/0092-8674(93)90529-Y
  26. 10.1016/0092-8674(93)90530-4
  27. 10.1038/35002607
  28. 10.1261/rna.5980303
  29. 10.1016/S1534-5807(03)00025-X
  30. 10.1105/tpc.12.12.2351
  31. 10.1073/pnas.242607499
  32. 10.1016/S0092-8674(02)00793-6
  33. 10.1126/science.1088710
  34. 10.1073/pnas.97.26.14813
  35. 10.1093/emboj/19.13.3366
  36. 10.1046/j.1365-313X.1996.10030479.x
  37. 10.1016/S0960-9822(03)00281-1
  38. 10.1006/abio.1994.1112
  39. 10.1016/S0092-8674(02)00863-2
  40. 10.1104/pp.103.023630
  41. 10.1104/pp.010820
  42. Abel, S. & Theologis, A. (1998) Methods Mol. Biol. 82, 209–217.9664427 / Methods Mol. Biol. (1998)
  43. 10.1073/pnas.97.6.2940
  44. 10.1016/S0960-9822(02)00792-3
  45. 10.1146/annurev.cellbio.16.1.273
  46. 10.1091/mbc.10.7.2297
  47. 10.1002/j.1460-2075.1996.tb00513.x
  48. 10.1016/S1369-5266(03)00084-0
  49. 10.1016/S1369-5266(02)00280-7
  50. 10.1104/pp.010442
  51. 10.1105/tpc.008417
  52. 10.1016/S1369-5266(00)00189-8
Dates
Type When
Created 21 years, 6 months ago (Jan. 27, 2004, 1:23 p.m.)
Deposited 3 years, 4 months ago (April 12, 2022, 8:47 a.m.)
Indexed 34 minutes ago (Aug. 27, 2025, 9:48 a.m.)
Issued 21 years, 7 months ago (Jan. 13, 2004)
Published 21 years, 7 months ago (Jan. 13, 2004)
Published Online 21 years, 7 months ago (Jan. 13, 2004)
Published Print 21 years, 7 months ago (Jan. 27, 2004)
Funders 0

None

@article{Han_2004, title={The Arabidopsis double-stranded RNA-binding protein HYL1 plays a role in microRNA-mediated gene regulation}, volume={101}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.0307969100}, DOI={10.1073/pnas.0307969100}, number={4}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Han, Meng-Hsuan and Goud, Saiprasad and Song, Liang and Fedoroff, Nina}, year={2004}, month=jan, pages={1093–1098} }